Top positive review
Case cutouts are tricky
on 29 December 2016
The instructions made this easy for me to install without calling an electrician. I'm a lowish skill DIYer so I needed clear instructions and found that the documentation was very helpful - clearly labeled diagrams and safety instructions. Diagram options include flush and non flush wall fittings. The box does need to be earthed.
The problem I had was in "poking through" a hole into the indicated cable cutout in the plastic case. I needed to do this in order to feed the appliance's thick 13A cable into the Horstmann switch. There's no way to simply poke the lightly scored hole through the thick plastic casing so a drill, as far as I can tell, is needed if you want to feed cable into the bottom of the unit whilst having it flush to the wall. The cosmetic results weren't neat although nobody will ever see this because the hole is at the bottom of the installed unit and, moreover, it's not a safety issue. For me though, it speaks of non user friendly design and it does let the product down.
Aside from this problem, it's a clearly a high quality unit made from thick and robust plastic that gives the unit a solid feel unlike the failed Timeguard booster unit I was replacing which is light and somewhat flimsy in comparison (although it does have sensible cable cutouts).
This Horstman unit has a red LED which only comes on when the unit is in boost mode (when it is giving power to the appliance). The boost button selects from the three available boost time options - 15, 30 or 60 minutes.
I would recommend the switch and would not hesitate to buy another one.